body{
	margin:0;
	padding:0;
	background-image: url(https://ss1.bdstatic.com/70cFuXSh_Q1YnxGkpoWK1HF6hhy/it/u=4061915345,3678613168&fm=27&gp=0.jpg);
	background-repeat: no-repeat;
	background-size: 100% 890px;
}
/*https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1531392477803&di=bcf4ae677ae3a174adfb73be0ef4b744&imgtype=0&src=http%3A%2F%2Fimg.zcool.cn%2Fcommunity%2F01bb885902d502a801214550c6f00c.png%40900w_1l_2o_100sh.jpg
http://img4.imgtn.bdimg.com/it/u=510473397,2111593555&fm=27&gp=0.jpg*/
body:after{
    content:"";
    width:100%;
    height:100%;
    position: absolute;
    left:0;
    top:0;
    background: inherit;
    filter: blur(0px);
    z-index: -1;

}
.main_context{
	width: 800px;
	height: 500px;
	margin-left: 260px;
	margin-top: 60px;
	border: 5px solid #FFFFFF;
	border-radius: 15px;
	opacity: 0.8;
}
.content{
	width: 830px;
	height: 470px;
	background-color: #FFFFFF;
	margin-left: 25px;
	margin-top: 70px;
	border-radius: 12px;
	opacity: 0.4;
	text-shadow: 1px 1px 5px #FFFFFF;
}
p{
	font-family: 微软雅黑;
	font-size: 50px;
	letter-spacing: 5px;
	color: #336600;
	position: relative;
	top: 60px;
	left: 100px;
	opacity: 1;
	padding-top:20px; 
}
.welcome{
	position: relative;
	left: 300px;
	top:100px;
}